Travel control device for hybrid vehicle

The travel control device for hybrid vehicles addresses the issue of EV priority mode deselection by prioritizing EV traveling and performing motoring control to avoid engine rotational drive, ensuring efficient operation despite battery electricity restrictions.

US12409830B2Active Publication Date: 2025-09-09MITSUBISHI MOTORS CORP
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Patent Information

Application Number
US18/576534
Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
Filing Date
2021-10-08
Publication Date
2025-09-09
Estimated Expiration
2041-10-31

AI Technical Summary

Technical Problem

In hybrid vehicles with an EV priority mode, increasing regenerative braking intensity while the driving battery restricts electricity acceptance necessitates deselecting the EV priority mode, leading to engine rotational drive by the power generation motor generator.

Method used

A travel control device with an acceleration control part and regenerative control part that prioritizes EV traveling over engine traveling, restricts or prohibits regenerative braking, and performs motoring control to rotationally drive the engine using generated electricity, deselecting the EV priority mode if regenerative braking intensity increases despite battery restrictions.

Benefits of technology

Enables cancellation of the EV priority mode when battery electricity acceptance is restricted, preventing engine rotational drive by the power generation motor generator, maintaining efficient vehicle operation.

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Abstract

A travel control device for a hybrid vehicle includes: an acceleration control part for controlling a traveling motor generator or an engine based on a depression amount of an accelerator pedal; and a regenerative control part for controlling the traveling motor generator with a regenerative control intensity set by an operation part. The acceleration control part includes: an EV priority control portion for prioritizing EV traveling over engine traveling. The regenerative control part includes: a restriction portion for restricting or prohibiting regenerative braking; and a forced regeneration portion for performing regenerative braking on a driving wheel and rotationally driving a power generation motor generator by electricity generated in the traveling motor generator to rotationally drive an engine, if the regenerative braking intensity is increased by the operation part in a state where the restriction portion restricts or prohibits the regenerative braking. The acceleration control part deselects an EV priority mode if the regenerative braking intensity is increased by the operation part in a state where the EV priority mode is selected and acceptance of electricity to the driving battery is restricted.
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